For many people, the first childhood experience with an animal is with a dog or cat. Familiar animals serve as a baseline of expectations of unfamiliar animals. The relative familiarity of various pets can be estimated from data provided by the American Veterinary Medical Association (AVMA), which provides estimates of the number of pet dogs, cats, birds, and horses in the U.S. AVMA U.S. Pet Ownership, 20121 Dogs Cats Birds Horses Percent of households owning 36.50% 30.40% 3.10% 1.50% Number of households owning 43,346,000 36,117,000 3,671,000 1,780,000 Average number owned per household for households owning 1+ 1.6 2.1 2.3 2.7 Total number in United States 69,926,000 74,059,000 8,300,000 4,856,000 The American Pet Products Association (APPA) also provides such estimates. The estimates below are higher…